PTFE 8A X
PTFE 8A X is a free-flowing white powder composed of relatively large particles and ideal for isostatic molding. Its most unique features are improved moldability at lower pressure and improved surface smoothness of finished parts.
PTFE 8A X is often preferred for molding thick sheets and is sometimes used for ram extrusion of rod and tubing with thicker cross-sections. Properly processed products made from neat PTFE 8A X provide the superior properties typical of fluoroplastic resins.
PTFE 8A X is processed in two steps: preforming and sintering. The powder is first compacted into a preformed shape approximating that of the desired molding. A precise heating (sintering) and cooling cycle is then used to consolidate the molding at temperatures above the crystalline melting point of the neat powder. The properties of a finished molding are dependent on preform pressure, sintering time and temperature, and cooling rate. PTFE 8A X is used to make relatively large objects in molds that can be filled manually. Small particle resins do not flow properly in automatic feeding systems.
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